Airline: boom and bust cycles with big money during the boom times. 200-300k etc a year Big-3. May "get rich" may also get very broke. May never fly with the same Captain ever. 10,000+ pilots each Major etc. Set parking brake, you are done. Loose your medical may be a big deal. everything is about seniority. Aircraft is a tool to make money. Point A to Point B. Houston to Tulsa. Airline jobs are about making the company money, and making yourself money
Govt Jobs: retirement package, healthcare in retirement (healthcare on duty too, obviously), salary low to mid 100's in most cases, full retirement at age 50 with healthcare in some law enforcement jobs. Will never be rich, will never be broke either. Start a second career. Commonly have a core group of coworkers you get to know pretty well. This is good and bad. Collateral duties, "work on this project", powerpoints, etc may be assigned to you. Good if you like that stuff. Loose your medical ? Salary will continue without a hiccup (in most cases) while you get assigned to a "support role" pending medical return. Seniority plays a role but a "slug" senior to you will probably not get that cool assignment or new aircraft training (but maybe he will). Ready room mentality. Reputations and credibility are very important. Great pilots but those who complain all the time are avoided for TDY duty, just-average pilots who never whine and are cool TDY dudes are always in demand. "get the mission done" etc. Aircraft is a tool to provide success to the ground guys (most agencies). Govt is flying 737, 757, G-550, King Airs, P-3, UH-60 Blackhawks, Cessnas, Challengers, and other stuff. Govt does not conduct flights, it conduct missions. Most Govt flying is is some form designed to protect America or make America safer in some manner. It is "not about you." PIC/Captain is called Aircraft Commander. this requires some de-Governmentalizing at resume / job fair time, especially for younger millennial HR types. "Why do you operate a King Air with a crew, isn't that a single pilot airplane?" etc. stuff.
Some Govt jobs will send pilots to annual recurrent events, conduct internal annual checkrides, surprise no-announce checkrides, send pilots to water survival/dunker school, survival school, etc. Many are highly structured and modeled after military programs.
etc
two different worlds